scholarly journals PENGARUH WAKTU POLISHING DAN ASAM SITRAT TERHADAP MICROLEAKAGE PADA TUMPATAN RESIN KOMPOSIT NANOFILLER AKTIVASI LIGHT EMITING DIODE - In Vitro

2015 ◽  
Vol 1 (1) ◽  
pp. 11
Author(s):  
Dhurohmah . ◽  
Rochman Mujayanto ◽  
Siti Chumaeroh
Keyword(s):  
Citric Acid ◽  
Composite Resin ◽  
Distilled Water ◽  
Test Results ◽  
Class V ◽  
Group I ◽  
Significant Difference ◽  
Composite Resin Restoration ◽  
The Difference

Background: The objective of this research is to investigate influence of polishing time and citric acid on microleakage in nanofiller composite resin restoration (Z350XT,3M). Method: The research was conducted on a class V restoration amount sample 24 on bovine teeth. The first group restoration was polished immediately after curing then was soaked in distilled water. The second group was polished immediately after curing and then was soaked in citric acid.The third group was polished after 24 hours of curing and then was soaked in distilled water. The fourth group was polished after 24 hours of curing then was soaked in citric acid. Samples were immersed for 7 days and then were soaked in methylene blue for 1 day and were split longitudinally and were observed using microskopstereo and were measured using calipers. Result: Data were analized by Kruskal-wallis with the result of p > 0,05, there is a significant difference in group I, II, III, and IV. Mann- Whitney test results the difference between the data. Conclusion: The conclution is there were significant differences between the groups which immersed with citric acid of distilled water and there is no significant difference between groups which polished immediately and polished 24 hours later.

scholarly journals Microleakage analysis of dental caries lesions sealed with flow resin and compared to microhybrid resin restorations in dentin

2018 ◽  
Vol 66 (2) ◽  
pp. 141-146
Author(s):  
Amanda de Albuquerque VASCONCELOS ◽  
Juliana Tietbohl de Almeida REIS ◽  
Bianca Fiorentin MOURA ◽  
Daniela Cavalcante GIRÃO ◽  
José Carlos Pettorossi IMPARATO ◽  
...  
Keyword(s):  
Composite Resin ◽  
Descriptive Analysis ◽  
Resin Flow ◽  
Occlusal Caries ◽  
Dye Penetration ◽  
Group I ◽  
Significant Difference ◽  
Distal Direction ◽  
Caries Lesions

ABSTRACT Objective: To evaluate the sealing of cavities of dentinal occlusal caries lesions, reproduced in vitro, with flow resin compared to cavity restorations presenting healthy dentin using microhybrid composite resin. Methods: The sample consisted of 27 healthy deciduous molars where cavities of approximately 2 mm in the fossa region were performed and occlusal cleft of each tooth were sealed, impermeabilization was performed and the sample was randomly divided into 2 groups: group I underwent cariogenic challenge and occlusal sealing with resin flow. The teeth of group II were restored with microhybrid composite resin. The teeth were immersed in 5% methylene blue for 8 hours at 37° C and washed until all the dye was removed from the surface. The teeth were sectioned in the mesio-distal direction. The penetration of the dye was evaluated: 0- no penetration; 1- dye penetration up to 1/3 of the restoration; 2- dye penetration up to 2/3 of the restoration depth; 3 - penetration of dye into the pulp wall. The results were analyzed by the Biostat 4.0 program. Descriptive analysis and the mode among the examiners submitted to the Mann-Whitney test. Results: There was no significant difference in microleakage between restoration performed in healthy dentin with microhybrid composite resin or maintenance of infected dentin in primary teeth sealed with resin flow (p = 0.6035). Conclusion: It was concluded that the marginal infiltration of primary molars sealed with microhybrid composite resin and resin flow was not influenced by the removal -or not -of the carious tissue or the material used.

Flowable Composites as “Filled Adhesives:” A Microleakage Study

2004 ◽  
Vol 5 (4) ◽  
pp. 32-41 ◽  
Author(s):  
Luis Guilherme Sensi ◽  
Fabiano Carlos Marson ◽  
Sylvio Monteiro ◽  
Luiz Narciso Baratieri ◽  
Mauro Amaral Caldeira de Andrada
Keyword(s):  
Tap Water ◽  
Resin Composite ◽  
Control Group ◽  
Single Bond ◽  
Class V ◽  
Group I ◽  
Significant Difference ◽  
Group 2 ◽  
Flowable Composites

Abstract Objective The purpose of this in vitro study was to investigate the microleakage at dentin margins of a flowable resin composite associated with an adhesive, either light cured separately or co-cured, in Class V cavities. Materials and Methods Twenty four recently extracted human molars were prepared with standardized boxshaped Class V cavities of 3.0 mm (mesial-distal), 2.0 mm (occlusal-gingival), and 2.0 mm depth with margins located on enamel and dentin/cementum on the buccal or lingual surfaces. The cavities were randomly assigned into three groups (n=8): Group I – Single Bond + Filtek Z250 (control); Group II – Single Bond + Filtek Flow (light cured separately) + Filtek Z250; and Group III – Single Bond + Filtek Flow co-cured (light cured simultaneously) + Filtek Z250. After being immersed in tap water for 24 h, the specimens were thermocycled (1000x, 5°-55°C, 30 sec dwell time) and immersed in a 0.5% basic fuchsine solution for 24 h. The restorations were sectioned longitudinally and gingival margins were evaluated for microleakage using a 0-4 scale. Data were subjected to the Kruskal-Wallis test at p<0.05. Results A statistically significant difference at p = 0.0044 between Groups 1 and 3 and Groups 2 and 3 was observed. Although Group 2 performed slightly better than Group 1, no significant difference was observed. Conclusion The use of a flowable resin composite cured simultaneously with an adhesive yielded the worst results in this study. As no statistical differences were seen between Groups 1 and 2, the use of a flowable composite as a means of minimizing microleakage at dentin margins may be questioned. Citation Sensi LG, Marson FC, Monteiro S Jr., Baratieri LN, de Andrada MAC. Flowable Composites as “Filled Adhesives:” A Microleakage Study . J Contemp Dent Pract 2004 November;(5)4:032-041.

scholarly journals The difference of tensile bond strength between total and self etch adhesive systems in dentin

2010 ◽  
Vol 22 (1) ◽  
Author(s):  
Selly Yusalina ◽  
Moch. Richata Fadil ◽  
Milly Armilia
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Adhesive System ◽  
Tensile Bond Strength ◽  
Single Bond ◽  
Conservation Area ◽  
Composite Resin Restoration ◽  
The Difference ◽  
Self Etch

Total etch adhesive system has been widely used in teeth conservation area as an adhesive agent before implicating composite resin restoration agent. The aim of this research is to prove the difference of tensile bond strength between total etch (Single Bond) and self etch adhesive system (Adper prompt L-Pop) on dentin surface in vitro. The extracted and non carries maxillary premolar teeth were used in this research and were divided into 2 groups. The first group comprised 15 specimen teeth etched in phosphoric acid and was applicated with the Single Bond adhesive agent. The second group comprised 15 specimen teeth, applicated with the Adper Prompt-L-Pop. The composite resin (Z 350, 3M) was applied incrementally and each of the layers was rayed for 20 seconds. The specimens were stored in physiologic solution before they were tested. Tensile bond strength was measured by LRX Plus Lloyd Instrument, with 1 N load and 1 mm/minute speed, and the measurement result was in Mpa unit. The result was evaluated statistically by the Student t-test with α = 0.05. Single Bond (the 5th generation) showed a better bond strength compared to the Adper Prompt-L-Pop (the 6th generation).

Comparative Evaluation of Solubilities of Two Nanohybrid Composite Resins in Saliva Substitute and Distilled Water: An in vitro Study

2017 ◽  
Vol 7 (2) ◽  
pp. 82-85 ◽  
Author(s):  
Pranjal S Walzade ◽  
Sumanthini MV ◽  
Vanitha U Shenoy ◽  
Rohini P Mahajan
Keyword(s):  
Comparative Evaluation ◽  
Composite Resin ◽  
Composite Resins ◽  
Long Term Results ◽  
P Value ◽  
Distilled Water ◽  
Saliva Substitute ◽  
Significant Difference ◽  
Nanohybrid Composite

ABSTRACT Aim of the study To determine the solubility of nanohybrid (NH) composite resins when immersed in saliva substitute and distilled water. Materials and methods A total of 60 disc-shaped samples (n = 30) were prepared in teflon molds of diameter 10 mm × 2 mm thickness from two NH composite resins. They were light-cured following which the samples were removed and weighed three times using a digital balance. Samples were then immersed in test solutions, i.e., 100 mL of distilled water and saliva substitute each stored for 24 hours and 7, 14, 21, and 28 days in an incubator at 37°C at 100% humidity. At the time intervals mentioned, the samples were removed from the incubator, washed with distilled water, blotted dry, and weighed. Samples were again immersed in fresh test solutions. Difference in preweight and postweight of samples was calculated and data were analyzed using appropriate test by testing normality. A p-value < 0.05 was considered to be significant. Results The results were analyzed using one-way analysis of variance (ANOVA). As observed from the baseline weight to the 28th day weight, there was a loss of weight of the samples in all the groups except NH composite resin (Flash) in distilled water. Conclusion From the results of the study, it was observed that there was no statistically significant difference in weight, with respect to the solubility of the two NH composite resins and the two solutions tested. Clinical significance of the study is that the NH composite resin that shows lesser solubility can be the choice for an esthetic restorative material in patients for long-term results. How to cite this article Mahajan RP, Shenoy VU, Sumanthini MV, Walzade PS. Comparative Evaluation of Solubilities of Two Nanohybrid Composite Resins in Saliva Substitute and Distilled Water: An in vitro Study. J Contemp Dent 2017;7(2):82-85.

scholarly journals Evaluation of the influence of dental bleaching with 35% hydrogen peroxide in orthodontic bracket shear bond strength

2013 ◽  
Vol 18 (2) ◽  
pp. 95-100 ◽  
Author(s):  
Marcus Vinicius Neiva Nunes do Rego ◽  
Roanselli Marllon Lima dos Santos ◽  
Leanne Matias Portela Leal ◽  
Carlos Gustavo Silva Braga
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Testing Machine ◽  
Nonparametric Test ◽  
Distilled Water ◽  
Orthodontic Bracket ◽  
Group Iii ◽  
Group I ◽  
Significant Difference

OBJECTIVE: The purpose of this study was to evaluate, in vitro, the bond strength of brackets bonded to premolars previously subjected to bleaching with a 35% hydrogen peroxide. METHODS: Twenty one healthy premolars were selected and randomly divided into three groups (n = 7). Group I (G1) included teeth that were not submitted to bleaching. The enamel surfaces of Groups II (G2) and III (G3) were submitted to a bleaching process with 35% hydrogen peroxide (Whiteness HP Maxx). On Group II (G2), after bleaching, the teeth were stored for 24 hours in distilled water at 98.6 ºF, and then, premolar metallic brackets were bonded using Transbond XT (3M) resin. Group III (G3) was submitted to the same procedure seven days after bleaching. After bonding, all teeth were stored in distilled water at 98.6 ºF for 24 hours. All groups were submitted to a traction test using an EMIC DL2000 universal testing machine at a speed of 0.5 mm/min. RESULTS AND CONCLUSION: The bracket resistance to debonding was compared between the groups by the Kruskal-Wallis nonparametric test (p < 0.05) and it was verified that the bleaching agent significantly reduced bracket adhesion when bonded 24 hours after bleaching. However, seven days after bleaching, there was no significant difference on the resistance to debonding among groups G1 (19,52 kgf) and G3 (18,44 kgf), meaning that it is necessary to wait longer after bleaching to bond brackets.

scholarly journals The effect of toothpastes with bleaching agents on the force decay of elastomeric orthodontic chains

2017 ◽  
Vol 11 (04) ◽  
pp. 427-431 ◽  
Author(s):  
Mohammad Behnaz ◽  
Kazem Dalaie ◽  
Sepanta Hosseinpour ◽  
Fatemeh Namvar ◽  
Leila Kazemi
Keyword(s):  
Water Solution ◽  
Initial Time ◽  
Control Group ◽  
Distilled Water ◽  
Force Decay ◽  
Significant Difference ◽  
Initial Time Point ◽  
The Difference ◽  
Elastomeric Chains

ABSTRACT Objective: The aim of this study was to evaluate the effect of agents available in whitening toothpastes (Crest® and Sensodyne®) in vitro on the force decay of elastomeric chains used in orthodontics. Materials and Methods: A total of 300 specimens of elastomeric chains were divided into five groups (n = 60) and were evaluated. These groups included (1) the regular Crest® toothpaste and distilled water solution, (2) whitening Crest® toothpaste and distilled water solution, (3) regular Sensodyne® toothpaste and distilled water solution, (4) whitening Sensodyne® toothpaste and distilled water solution, and (5) distilled water as a control group. The samples' force was measured using Instron at intervals of 0, 1, 7, 14, 21, and 28 days. Data were analyzed by SPSS software. Results: At the initial time point, the difference in the force values of elastomeric chain between any of the groups was not significant (P > 0.05). On the 1st day, there was a significant difference (P < 0.05) between all groups except the groups of whitening Crest®, regular, and whitening Sensodyne® (P > 0.05). On days 7, 14, and 28, the rate of decline for all groups was statistically significant (P < 0.05). Conclusions: According to the results obtained in the present study, it seems that toothpastes without whitening agents have less effect on force decay of elastomeric chain over time.

scholarly journals COMPARATIVE EVALUATION OF WATER SORPTION AND SOLUBILITY OF DIFFERENT RESTORATIVE CEMENTS: AN IN-VITRO STUDY

2020 ◽  
pp. 1-4
Author(s):  
Gayatri Deshmukh ◽  
Anant A. Heda ◽  
Narendra U. Manwar ◽  
Shravan Rathi ◽  
Neelam Rahul ◽  
...  
Keyword(s):  
Water Sorption ◽  
Water Solubility ◽  
In Vitro Study ◽  
High Strength ◽  
Dry Mass ◽  
Distilled Water ◽  
Test Results ◽  
Gold Label ◽  
The Difference

Aim: The purpose of this study is to compare and evaluate the water sorption and solubility of ve different types of restorative cements, in order to show variations that may reduce their effectiveness. Materials and methods: Five discs each of ve different materials viz. Ketac Molar (3M ESPE), Universal Restorative 2 (GC Gold Label), Ionol plus (VOCO), High Strength Posterior Restorative 9 (GC Gold Label) and Cention-N (Ivoclar) were prepared. The discs were weighed individually on precision weight scale, dehydrated and weighed again after storing for 1 day at 37oC in 50 ml distilled water. Again, the discs were stored for a week in 50 ml of distilled water at 37oC. All the discs were weighed individually after 7 days, dehydrated and new weights were again recorded. Water solubility of material and its water sorption were obtained from the difference between the intial and the nal dry mass of each disc, after 1 day and 7 days of immersion in distilled water. Data was analyzed for signicant difference by one-way ANOVAand Tukey's test. Results: The water sorption values were minimal with Cention-N after 1 day followed by Ketac Molar, Ionol Plus, Universal Restorative 2 and High Strength Restorative 9; and after 7 days, water sorption values were minimal for High Strength Restorative 9 followed by Ketac Molar, Ionol Plus, Cention- N and Universal Restorative 2. The solubility values were minimal with Cention-N after 1 day and 7 days followed by Ionol plus, Ketac molar, High strength restorative 9 and Universal restorative 2. Conclusion: Among the tested restorative cements, water sorption was minimal with Cention –N after 1 day whereas it was minimal for High Strength Restorative 9 after 7 days. Solubility was minimal for Cention-N after 1 day and 7 days.

scholarly journals The Effect of Two Different Polishing Techniques on Microleakage of New Composites in Class V Restorations

2006 ◽  
Vol 7 (5) ◽  
pp. 18-25 ◽  
Author(s):  
Meserret Baseren ◽  
Filiz Yalcin ◽  
Yonca Korkmaz
Keyword(s):  
Composite Resin ◽  
Class V ◽  
Significant Difference ◽  
Different Types ◽  
Nanohybrid Composite ◽  
Group 3 ◽  
Group 2 ◽  
Silicon Based ◽  
Group 1

Abstract Aim The purpose of this study was to investigate the effect of polishing systems on the microleakage of a nanofill, a nanohybrid, and a microhybrid composite in Class V cavities. Methods and Materials Preparations were made at the cemento-enamel junction (CEJ) of 36 extracted human premolars. The teeth were randomly divided into three groups and restored with new resin composites according to the manufacturers’ instructions as follows: Group 1, Filtek Supreme & Single Bond; Group 2, Grandio & Solobond; and Group 3, Artemis & Excite. The restorations were finished with diamond finishing burs. The restored/finished teeth were randomly divided into two groups and polished using the following systems: Super-Snap (Al2O2 coated, abrasive disc system, fine grit, and extra fine grit) and Astropol/Astrobrush (silicon-based abrasive polisher point and polisher brush). All specimens were thermocycled 1000 times with a 10 second dwell time. They were immersed in 0.5% aqueous basic fuchsin dye for 24 hours and then sectioned buccal-lingual-longitudinally through the center of both restorations of each tooth and evaluated under a stereomicroscope at 30X magnification. The degree of dye penetration was quantified. Result No significant difference in leakage scores was observed in enamel margins (p=0.456, Kruskall Wallis test), but dentin margins were significantly affected by the different polishing systems (p=0.037, Kruskall Wallis test). The lower leakage scores were recorded for Astropol/Astrobrush polishing systems. The nanofill composite showed the least leakage among the test groups in this study. The most leakage was observed in nanohybrid composite resin (p<0.05, Mann Whitney U test). Conclusions Under the conditions of this in vitro study: the microleakage resistance of composites at enamel margins is not significantly affected by the different polishing systems; the lowest leakage scores were recorded for Astropol/Astrobrush polishing techniques in different types of composites; and the ranking of the composite materials from most to least leakage at the dentin margins according to polishing techniques was Grandio >Artemis > Filtek Supreme. Citation Yalcin F, Korkmaz Y, BasŞeren M. The Effect of Two Different Polishing Techniques on Microleakage of New Composites in Class V Restorations. J Contemp Dent Pract 2006 November;(7)5:018-025.

scholarly journals Comparison of Microleakage of Class V Cavities restored with the Embrace WetBond Class V Composite Resin and Conventional Opallis Composite Resin

2017 ◽  
Vol 18 (10) ◽  
pp. 867-873 ◽  
Author(s):  
Maryam Tavangar ◽  
Zahra Zohri ◽  
Hosein Sheikhnezhad ◽  
Shahrzad Shahbeig
Keyword(s):  
High Speed ◽  
Composite Resin ◽  
Adhesive System ◽  
Rank Test ◽  
Class V ◽  
Gingival Margin ◽  
Group I ◽  
Signed Rank Test ◽  
Group Ii

ABSTRACT Purpose This study was undertaken to compare the microleakage of class V cavities restored with the newly introduced Embrace WetBond class V (EWC) composite resin and conventional Opallis composite resin. Materials and methods In this in vitro study, class V cavities were prepared on 30 extracted bovine incisors, with the gingival floor and the coronal margin of the cavities 1 mm apical and coronal to the cementoenamel junction (CEJ) respectively. The cavities measured 3 mm in length, 2 mm in width, and 1.5 mm in depth. The teeth were randomly divided into two groups. In group I, the cavities were restored with Opallis composite resin in association with ExciTE adhesive system (total-etch); in group II, the EWC composite resin was used for restorations. After 500 thermocycling procedures, the teeth were immersed in 0.5% fuchsin solution for 24 hours. Then, the samples were placed within a polyester model and sectioned in the buccolingual direction. The samples were evaluated under a stereomicroscope at ×30 for the penetration of dye. The enamel and dentin margins were evaluated separately. To test ordinal results, we used nonparametric statistical methods. To find out whether each independent composite groups I and II came from the same populations, we used Mann–Whitney U test and to compare two related samples’ coronal margin and gingival margin, Wilcoxon signed-rank test was used. Results There was significantly more microleakage in group II at both the enamel and dentin margins (coronal margin: p = 0.04; gingival margin: p = 0.21). In both groups, microleakage gingival margins was significantly higher than that at coronal margins (group I: p = 0.008; group II: p = 0.26). Conclusion Despite the high speed and the short process of restoration with Embrace WetBond, it is not a reliable restorative material for class V cavities due to its inadequate marginal seal. How to cite this article Tavangar M, Zohri Z, Sheikhnezhad H, Shahbeig S. Comparison of Microleakage of Class V Cavities restored with the Embrace WetBond Class V Composite Resin and Conventional Opallis Composite Resin. J Contemp Dent Pract 2017;18(10):867-873.

scholarly journals Reinforcing Effects of Calcium Silicate-based Cement and Dual Cure Composite Resin in Simulated Immature Teeth with an Open Apex: An in vitro Study

2017 ◽  
Vol 10 (4) ◽  
pp. 351-357
Author(s):  
Murtuza S Zhabuawala
Keyword(s):  
Calcium Silicate ◽  
Fracture Resistance ◽  
Composite Resin ◽  
In Vitro Study ◽  
Group Iii ◽  
Immature Teeth ◽  
Group I ◽  
Significant Difference ◽  
Reinforcing Effects

ABSTRACT Aim To evaluate the fracture resistance of simulated immature teeth with an apical plug of biodentine followed by composite resin vs total obturation with biodentine tested immediately and after 3 months of aging and also to find out the chemical composition of dentin in contact with these materials. Materials and methods Extracted human maxillary central incisors with simulated immature apex with radicular dentin thickness (RDT) of 1 to 1.5 mm selected and divided into three groups of 20 each. Group I (control)—4 mm biodentine apically and thermoplasticized gutta-percha. Group II—4 mm biodentine apically and composite resin. Group III—complete obturation with biodentine. About 10 samples from each group were tested immediately and remaining 10 stored in phosphate buffered solution (PBS) and tested after 3 months for fracture resistance and chemical analysis of dentin. Results No significant difference in fracture resistance between the groups was observed when tested immediately. After 3 months of aging, only biodentine group showed a significant reduction in fracture resistance with increased Ca/P ratio of root dentine. Conclusion Biodentine group has shown drastic reduction in fracture resistance after 3 months of aging, and hence, cannot be recommended as a reinforcement material in immature teeth with thin dentin walls. How to cite this article Zhabuawala MS, Nadig RR, Pai VS, Gowda Y, Aswathanarayana RM. Reinforcing Effects of Calcium Silicate-based Cement and Dual Cure Composite Resin in Simulated Immature Teeth with an Open Apex: An in vitro Study. Int J Clin Pediatr Dent 2017;10(4):351-357.

Sign in / Sign up

Export Citation Format

Share Document